The MkII Handheld Programmer is designed to compliment all MkII devices and to assist the comissioning engineer on site. Smoke and heat detectors can be tested when plugged on the programmer and alarm LED’s can be verified prior to installation. The unit will softly address all devices without using the incorporated dip-switch on the field devices. The MkII Programmer can re-program the opto-heat detectors to either heat or smoke detector.